| 摘要 |
<p>In a digital broadcasting system (DAB), the file to be transmitted is segmented and each segment is placed in the data field of a data group (DG) and the data group is divided into sections for transmission, which are placed in the data fields of data packets. For each file, at least one information data group (IDG) containing information parameters, one of which contains information as to which files constitute a group of files, is formed and transmitted. According to the invention, when the receiver is to receive an entire group of files, an integrity of group parameter consisting of a number is added to the information data group (IDG) associated with each file, a first value of said number indicating that the file in question is a file between the first and last files of the group while a second value indicates that the file is the first file of the group and a third value indicates that the file is the last file of the group. When the receiver is to receive only one special file from a group of files, a fourth value of said number is added as in integrity of group parameter to the information data group (IDG) for this file, whereas no integrity of group parameter is added for the other files in the group. In this way, it is possible to load only the startup file in the receiver while other files are only received as required.</p> |
